US1405857A - Door latch - Google Patents

Description

P. H. NEIDIG.

DOOR LATCH. APPLICATION FILED FEB. 1'9, 192:.

1,405,857, Patented Feb. 7, 1922.

A C W A V/Z UNITED STATES PATENT. OFFICE.

PERCY H.'NEIDIG, 0F MADISON, NEBRASKA.

DOOR LATCH.

Specification of Letters Patent.

particularly to that variety of door latchwherein two oppositely shiftable bolts are provided upon the inside of the door and so connected to a handle that when the handle is rotated in one direction the bolts are simultaneously projected into engagement with suitable keepers, and when the handle is operated in the opposite direction both of the bolts are retracted.

The general object of this invention is to provide a latch of this character which is very simply constructed and which may be readily assembled and put together, in which the handle, when shifted to its door latching position, is adapted to be latched by means of a padlock or like engaging device.

r A further object is to provide a lock of thischaracter which is adapted to be opened from both the inside and the outside of the door except when .the padlock is-in place,

and in which the operating lever is adapted.

to strike stops when the bolts are fully projected or fully retracted;

-Other objectswill appear in the course of the following description.

Myinvention is illustrated in the accom panying drawings, wherein V Figure 1 is a perspective view of a portion of a door and sill thereof showing latch in place and looking toward the inside of the door, the lintel of the door being partly in section;

Figure 2 is a perspective view looking toward the outside of the. door and showing the face plate and handle;

Figure 3 is a perspective view of the plate 27 Figure 4 is a perspective view of the member 31;

K Figure 5 is a dle and shank; v

Figure 6 is a perspective view of the extremity of the shank; 1 r

Figure 7 is an elevationof one of the latching bolts; 7 j V Figure 8 is a sectional viewthrough'the perspective view of the hansquared end of the shank showing the manner in which the plate 31 is engaged with the shank.

Referring to-these drawings, A designates a door, B the door sill, and C the lintel of the door. Mounted upon the inside face of the door A is a metallic plate 10 which is vertically slotted at one side so that a tongue of metal 11 is formed which is to be turned down into a position at right angles to the plane of the plate 10 and constitutes a stop. The center of the plate 10 is perforated for the passage of the shank 12 of an operating handle 13, the handle being disposed upon the exterior face of the door. This shank 12 extends through the aperture in the plate 10 and the inner extremity of the shank is reduced'in thickness, as at 14, the edge faces of this reduced. portion being formed with interrupted screw-threads, as at 15, for engagement by a nut 16. Carried upon this portion 14 of the shank, which is rectangular in cross section, is an operating lever 17 which is-formed of a strip of metal outwardly bowed at its middle and formed with a rectangular aperture 18 through which the rectangular-portion 14 passes and with two laterally directed portions formed with apertures 19, one of these portions having anupwardly and outwardly projecting handle 20.

Bolts 21 are engaged with the apertures 19, the extremities of the bolts being laterally bent to pass through these apertures and held in place by cotter pins 22. One of the bolts extends upward and the other downward, andv bothof these bolts are designed to pass through guides formed by plates 23 having U-shaped members 24 attached to them and projecting outwardly from the plates and through which the bolts pass. These plates are attached to the door by means of screws. Attached to the sill and to the lintel're'spectively are the keeper plates 25 which are longitudinally slotted, as at 26, and into which the bolts 21 are adapted to be projected. The sill and lintel respectively are recessed below these apertures to receive the bolts.

Patented Feb. 7, 1922.

ion

The shank 12 of the handle 13 passes through a plate 27 .attached to the outer face of the door by means of screws 27, this plate being approximately diamond-shaped handle 13 is formed with two oppositely disposed recesses 30 and engaged with this shank 12 is a metal strip 31 which 1s angularly bent, one arm of this strip being longitudinally slotted, as at 32, the other arm being perforated, as at 33. This str1p constltutes an angular arm which rotates with the shank of the handle. The bifurcated end of this strip is adapted to be disposed within the recesses 30 and then the extremities of the fork or bifurcation are forced inward over the shank, as illustrated in Figure 8, so that this angular arm 31 is mounted upon. the shank for oscillation therewith.

When the handle is in one position and the bolts 21 are projected into engagement with the lintel andsill respectively, the arm 31 is in such position that its opening 33 is in alignment with the opening 29. Under these circumstances a padlock may be placed through these openings, thus locking the handle from any return movement which would act to retract the bolts. When the padlock is removed, it is obvious that the handle may be shifted to retract the bolts. WVhen the handle is shifted into a vertical position, that is into a position wherein the aperture in the arm 31 is brought into alignment with the aperture 29, then the lever 17 will be turned into an approximately vertical position and the edge of this lever will bear against the edge of the stop 11. When this lever 17 is turned to a horizontal position to fully retract the bolts, then the lever will engage with the upper-face of the stop 11. Thus this stop acts-to limit the movement of'the lever and of the handle in opposite directions. The handle 20 forms means whereby the lock may be operated from inside the barn, garage or other building to which it is to be applied.

. This device is particularly intended for use on double swinging doors such as are used on garages, barns, stables and the like but, of course,'it may be applied to other uses. It will be seen that the device is very simple, easily operated, and that it forms an inside look both at the top and bottom of the door, the locking device itself being, however, at the middle of the door. Ordinarily .double doors are locked usually at the middle of the meeting edges of the door and thus the upper portionof the door may be pried outward or the lower portion thereof with the consequent likelihood of bursting the door, but by providing bolts at the upper and lower ends of the door, the upper and lower ends of the door are held firmly against any attempt to pry them open and there must be a break of the latch itself in order to permit the opening of the door.

The plate 27, as before stated, is held to the door by means of screws 27 and it will beseen from Figure 2 that one of these screws 27* is disposed in-such position that it is closed by the arm or plate 32 when the opening 33 is in alignment with the opening 29. Thus when a padlock is placed through these openings 33 and 29, the lower screw 2'7 is entirely concealed and cannot be removed, though the upper screw, of course, may be removed. Thus it would be impossible to open the look without breaking it. The lock holds the door securely and offers a very considerable protection against any one who might want to open it without a key for the padlock. The arm 31 is to be made of relatively heavy sheet metal and when the slotted end of this arm is closed upon the neck 30 of the spindle 12, the arm 31 will be firmly held against being detached from the spindle 12.

, I claim p 1. A latching means for doors including a plate having an outstanding apertured lug, a handle having a shank extending through the plate and oscillatable therein, an arm extending from the shank and disposed parallel to the plate, said arm having an angularly bent extremity formed with an aperture adapted to align with the aperture in the plate whereby a padlock may be inserted through the two apertures to hold the and rotatable into alignment with the aper-. tured member whereby a padlock may be in serted through the two apertures to hold the handle shank from rotation to a position to retract the bolts.

8. The combination with a door and a sill and lintel, of a handle having a shank rotatably mounted 111 13118 door, a lever mounted upon the inner end of the shank and extending in opposite directions therefrom, upwardly and outwardly extending bolts pivotally connected to the endsof the lever, guides on the inner face of the door through which the bolts pass, slotted keepers mounted upon the lintel and sill respec tively and into which the bolts are adapted to be projected, a stop limiting the rotation of thehandle shank, an apertured member 4. A latch of the character described including a plate adapted to be attached to the inside of a door, a handle having a handle shank extending through the plate, the inner end of the handle shank being rectangular and having interrupted screw-threads, a lever having a rectangular aperture through which the rectangular end of the shank passes, a bolt engaging the screw-threads of saidshank and holding it to the lever and the lever against said plate, upwardly and downwardly extending bolts pivoted to the extremities of the lever, said lever being formed at one end with a handle, a stop formd upon the plate and limiting the movement of the lever, said handle shank adjacent the handle being formed with oppositely disposed recesses, an arm slotted at one end to fit over said recesses and be held in rotative engagement with the handle shank, the end of the .arm being angularly bent and apertured, and a plate inwardof said arm through which the handle shank passes, the plate having an outwardly projecting apertured lug with which said arm is adapted to align whereby a padlock may be placed through said apertures.

5. The combination with a door, of latching means therefor including an oscillatable handle having a shank extending through the door, a lever carried upon the inner end of the shank, a vertically movable bolt operatively connected to the lever, a late mounted upon the exterior face of t e door and aving an angularly bent, perforated end, an arm mounted upon the handle shank and having. an angularly bent, perforated end adapted to align with the angular end of the plate and permit the passage of a padlock therethrough, and a screw holding the plate against the door and disposed through that portion of the plate covered by the arm when the door is locked.

6. A latch of the character described including a plate adapted to be attached'to a door, a handle having a handle shank extending through the plate, door locking means operatively connected to the shank to be actuated by an oscillation of the shank, an apertured lug formed upon the plate and outwardly projecting therefrom, and an arm carried upon the handle shank and disposed in parallel relationto the plate and having an apertured angular extremity adapted to align with the apertured lug of the plate whereby a, padlock may be placed through said apertures to lock the handle shank from movement.

In testimony whereof I hereunto afiix my signature.

PERCY H. NEIDIG.

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